{
  "annotation_id": "9107cffb-0d58-4608-8144-08fad366e608",
  "date_created": "2026-03-02T18:00:57.337000Z",
  "date_modified": "2026-03-02T18:00:57.337000Z",
  "file_hash": "ab18d871b3772cf6b41cbde4829524d9f8046ee399307b076dcd41af17e0d1b7",
  "private": false,
  "record": {
    "abstract": "The possibility to use the ultrashort ion bunches produced by circularly\npolarized laser pulses to drive a source of fusion neutrons with sub-optical\ncycle duration is discussed. A two-side irradiation of a thin foil deuterated\ntarget produces two countermoving ion bunches, whose collision leads to an\nultrashort neutron burst. Using particle-in-cell simulations and analytical\nmodeling, it is evaluated that, for intensities of a few $10^{19} W cm^{-2}$,\nmore than $10^3$ neutrons per Joule may be produced within a time shorter than\none femtosecond. Another scheme based on a layered deuterium-tritium target is\noutlined.",
    "arxiv_id": "physics/0505140",
    "authors": [
      "A. Macchi"
    ],
    "categories": [
      "physics.plasm-ph"
    ],
    "doi": "10.1007/s00340-005-2092-y",
    "journal_ref": "Applied Physics B 82, 337 (2006)",
    "title": "A Femtosecond Neutron Source",
    "url": "https://arxiv.org/abs/physics/0505140"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "a387194b-383d-4293-90ec-ab883e0dc31d",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}